Anti-shelf-overlapping fixes for several menus.

ui/login/login_ui_tools.js

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview JS helpers used on login.
+ */
+
+cr.define('cr.ui', function() {
+
+  function LoginUiTools() {

[dzhioev (left Google), 2014/08/01 16:26:13]

LoginUITools shouldn't be a function, object will be enough.

[dzhioev (left Google), 2014/08/01 16:26:13]

nit: 'Ui' looks ugly. I prefer LoginUITools

[merkulova, 2014/08/04 06:39:29]

Done.

[merkulova, 2014/08/04 06:39:29]

Done.

+  }
+
+  /**
+   * Computes max-height for an element so that it doesn't overlap shelf.
+   * @param {element} DOM element
+   */
+  LoginUiTools.getMaxHeightBeforeShelfOverlapping = function(element) {
+    var maxAllowedHeight =
+        $('outer-container').offsetHeight -
+        element.getBoundingClientRect().top -
+        parseInt(window.getComputedStyle(element).marginTop) -
+        parseInt(window.getComputedStyle(element).marginBottom);
+    return maxAllowedHeight;
+  };
+
+  // Export
+  return {
+    LoginUiTools: LoginUiTools
+  };
+});